LX2203

LX2203 TM ® Li-Ion Battery Charger P RODUCTION D ATA S HEET DESCRIPTION KEY FEATURES Up to 1A charge current Low drop out design Reverse leakage protection Linear thermal control loop Pre-charge conditioning Programmable Termination Current Short Circuit protected Small 3x3mm MLP package APPLICATIONS The LX2203 is a tiny linear battery charger for Lithium Ion or Lithium Polymer batteries. The LX2203 includes built in MOSFET, accurate current and voltage regulation, reverse blocking protection, over temperature control, and charge status indicator. The accurate programmable charge current and independent termination current programming make it easy to logically reprogram the charge current limit at any time. The LX2203 charges the battery in two phases: constant current and constant voltage. A reduced current conditioning mode is provided for deeply discharged batteries. The LX2203 automatically restarts if the battery voltage falls below the top-off threshold. The LX2203 enters a low quiescent current sleep mode when power is removed. W WW . Microsemi . C OM IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PDAs, MP3 Players Cell Phones Charging cradles Digital Cameras PRODUCT HIGHLIGHT AC/DC Adapter VIN VIN STAT CTP GND BAT BAT LX2203 CMP EN CCP + EN 0 1 MODE Sleep mode – charge disabled Charge enabled. ON/OFF PACKAGE ORDER INFO _ LX2203 LX2203 TA (°C) -40 to 85 LD Plastic MLP 10-Pin RoHS Compliant / Pb-free LX2203CLD Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX2203CLD-TR) Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX2203 TM ® Li-Ion Battery Charger P RODUCTION D ATA S HEET ABSOLUTE MAXIMUM RATINGS Supply Voltage (VIN)....................................................................................... -0.3V to 7V Input Signals (SHDN, EN,CMP) ...................................................................... -0.3V to 7V Battery Charging Current (IBAT)....................................................................................1.2A Operating Junction Temperature................................................................... -40C to 150°C Storage Temperature Range.........................................................................-65°C to 150°C RoHS / Pb-free Peak Package Solder Reflow Temp(40 seconds max. exposure) ............260°C (+0 -5) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. PACKAGE PIN OUT W WW . Microsemi . C OM VIN VIN STAT CTP GND 1 10 BAT BAT CMP EN CCP 2 9 3 8 4 Connect Bottom to Power GND 7 5 6 THERMAL DATA LD PACKAGE (Top View) RoHS / Pb-free 100% Matte Tin Lead Finish LD Plastic Micro Leadframe Package 10-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 49°C/W Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. FUNCTIONAL PIN DESCRIPTION Name BAT CCP CMP CTP EN GND STAT VIN Description Charging Output - This pin is wired to the positive terminal of the battery. (The negative battery terminal is wired to GND.) Charge Current Programming Pin - A resistor (Rccp) is connected between this pin and GND. See application section for programming information. Compensation Pin – Apply a 0.01µF capacitor between CMP and VIN pins. Charge Termination Programming Pin – A resistor (Rctp) is connected between this pin and GND See application section for programming information. Enable - Applying a TTL compatible Hi signal enables the charger, a Low signal disables the charger and puts it in sleep mode. Common Ground. Status - This pin is a logic low level when the battery is being charged. Pin can sink up to 5mA. PACKAGE DATA PACKAGE DATA Voltage Input – Supply Voltage. Must be greater than VBAT to charge. Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX2203 TM ® Li-Ion Battery Charger P RODUCTION D ATA S HEET Unless otherwise specified, the following specifications apply over the ambient temperature 0°C ≤ TA noted and the following test conditions: VVIN = 5V, VBAT =3.8V, Rccp = 90.9k, Rctp = 150k. Parameter MAIN CIRCUITRY Input Voltage Quiescent Current CTP Bias Voltage CCP Bias Voltage CONSTANT VOLTAGE MODE BAT Output Voltage Top Off Charge Droop Threshold Charge Termination Taper Current CONSTANT CURRENT MODE BAT Constant Current Conditioning Current Conditioning Current Mode Threshold Voltage LOGIC STAT Logic High Output STAT Logic Low Output EN Select Threshold EN bias current THERMAL SHUTDOWN Maximum Junction Temperature PASS ELEMENT Reverse mode current UNDER VOLTAGE LOCKOUT Rising Threshold Voltage Falling Threshold Voltage VUVLO+ VUVLO-IBAT VVIN < VBAT TJ VSTAT VSTAT VEN IEN ISTAT = -100uA ISTAT = 5mA Logic Hi Logic Lo VEN = Hi ICOND VBAT(COND) VBAT < VBAT(COND) VBAT(COND) /VBAT(MAX) VBAT(MAX) VDRP VDRP /VBAT(MAX) VBAT = VBAT(MAX) VVIN IGND VCTP VCCP VEN = Hi VEN = Lo ELECTRICAL CHARACTERISTICS ≤ 70°C except where otherwise W WW . Microsemi . C OM Symbol Test Conditions Min 4.35 LX2203 Typ Max 6 Units V mA µA V V 3 7 1.25 1.25 5 4.16 96 42 4.2 97 51 4.24 98 60 V % mA 0.9 4% 60 1.0 5% 63 1.1 6% 66 A ICOND IBAT % 4.5 0.5 2.0 0.8 8 V V µA °C 150 5 µA 4.2 3.9 V V ELECTRICALS ELECTRICALS Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX2203 TM ® Li-Ion Battery Charger P RODUCTION D ATA S HEET CHARGING PROFILE 4.5 CHARGE CURRENT PROGRAMMING W WW . Microsemi . C OM Charge Voltage And Current 4.0 1200 Charge Current (mA) 3.5 Voltage 3.0 2.5 2.0 1.5 1.0 Current 1000 800 600 400 200 0 0.5 0 0 0.5 1.0 1.5 2.0 2.5 0 4.0 8.0 12.0 16.0 Iccp Current (µA) Constant Charge Current Programming CHARGE VOLTAGE DISTRIBUTION 300 Charge Time (hours) TERMINATION CURRENT PROGRAMMING 800 250 200 Termination Current (mA) 600 COUT 0 20 40 60 80 100 150 100 400 200 50 0 0 4.171 4.174 4.176 4.179 4.181 4.183 4.186 4.188 4.191 4.193 4.196 4.198 4.201 4.203 4.206 4.208 4.210 4.213 4.215 4.218 4.220 4.223 4.225 4.228 4.230 1/Rctp (micromhos) Termination Current Programming V Post Trim Bat Volt 1.0A CHARGE CURRENT DISTRIBUTION 70 60 50MA TERMINATION DISTRIBUTION 1400 1200 1000 Count 50 Count 40 800 600 30 CHARTS CHARTS 20 400 10 200 0 -996.327E-03 -989.388E-03 -982.449E-03 -975.510E-03 -968.571E-03 -961.633E-03 -954.694E-03 -947.755E-03 -940.816E-03 -933.878E-03 -926.939E-03 -920.000E-03 -1.087 -1.080 -1.073 -1.066 -1.059 -1.052 -1.045 -1.038 -1.031 -1.024 -1.017 -1.010 -1.003 0 -60 -56 -52 -48 -44 -40 -36 -32 -28 -24 -20 More A Charge Current Post Trim Copyright © 2004 Rev. 1.0a, 2005-08-10 mA Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX2203 TM ® Li-Ion Battery Charger P RODUCTION D ATA S HEET SIMPLIFIED BLOCK DIAGRAM W WW . Microsemi . C OM + EN ENABLE UVLO VDD STAT CHARGE CONTROL BAT CHARGE TERMINATION CONTROL CTP CMP CONSTANT VOLTAGE CONTROL TEMPERATURE CONTROL CCP CONSTANT CURRENT CONTROL GND BLOCK DIAGRAM BLOCK DIAGRAM Figure 1 – Simplified Block Diagram Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX2203 TM ® Li-Ion Battery Charger P RODUCTION D ATA S HEET THEORY OF OPERATION W WW . Microsemi . C OM LX2203 CONTROL FLOW DIAGRAM Return to START if EN changes state or VIN is removed. S TART EN = 1 YES NO SLEEP V IN > V UVLO YES NO V IN > V BAT YES NO CONSTANT VOLTAGE CHARGE MODE NO V BAT >60% YES CONDITION CHARGE MODE TEMP < 1 50 YES NO REDUCE CHARGE CURRENT CONSTANT CURRENT CHARGE MODE NO I BAT V CV YES V BAT